DTC P0533

DTC P0533  : A/C Pressure Sensor Circuit High Voltage

DTC (PGM-FI)

1. Problem verification

   -1. Start the engine, and let it idle.

   - 2. Turn the blower switch on.

   - 3. Turn the A/C switch on.

   - 4. Check the parameter(s) below with the HDS.

   Signal	Threshold		Current conditions
   	Values	Unit	Values	Unit
   A/C PRESSURE SENSOR	More than 4.75	V

   Do the current condition(s) match the threshold?

   YES 

   The failure is duplicated. Go to step 2.

   NO 

   Intermittent failure, the system is OK at this time. Check for poor connections or loose terminals at the A/C pressure sensor and the PCM. If the on-board snapshot of this DTC is recorded, try to reproduce the failure under the same conditions with the on-board snapshot - Refer to: How to Troubleshoot the Fuel and Emissions Systems,How to Troubleshoot the Brake Booster Pressure Monitoring System (2016 2017 2018 2019 2020), .

2. Determine possible failure area (A/C pressure sensor, others)

   -1. Turn the vehicle to the OFF (LOCK) mode.

   - 2. Disconnect the following connector.

   A/C pressure sensor 3P connector

   - 3. Connect terminals A and B with a jumper wire.

   Terminal A	A/C pressure sensor 3P connector (female terminals) No. 1:
   Terminal B	A/C pressure sensor 3P connector (female terminals) No. 2:

   Courtesy of HONDA, U.S.A., INC.

   - 4. Turn the vehicle to the ON mode.

   - 5. Check the parameter(s) below with the HDS.

   Signal	Threshold		Current conditions
   	Values	Unit	Values	Unit
   A/C PRESSURE SENSOR	More than 4.75	V

   Do the current condition(s) match the threshold?

   YES 

   Go to step 3.

   NO 

   Replace the A/C pressure sensor .

3. Determine possible failure area (GND line, others)

   -1. Turn the vehicle to the OFF (LOCK) mode.

   - 2. Remove the jumper wire from the A/C pressure sensor 3P connector.

   - 3. Turn the vehicle to the ON mode.

   - 4. Measure the voltage between test points 1 and 2.

   Test condition	Vehicle ON mode
   	A/C pressure sensor 3P connector: disconnected
   Test point 1	A/C pressure sensor 3P connector (female terminals) No. 1:
   Test point 2	A/C pressure sensor 3P connector (female terminals) No. 3:

   Courtesy of HONDA, U.S.A., INC.

   Is there about 5.0 V?

   YES 

   Go to step 4.

   NO 

   Go to step 5.

4. Open wire check (PD SNSR line)

   -1. Turn the vehicle to the OFF (LOCK) mode.

   - 2. Jump the SCS line with the HDS, and wait more than 1 minute.

   - 3. Disconnect the following connector.

   PCM connector A (51P)

   - 4. Check for continuity between test points 1 and 2.

   Test condition	Vehicle OFF (LOCK) mode
   	A/C pressure sensor 3P connector: disconnected
   	PCM connector A (51P): disconnected
   Test point 1	A/C pressure sensor 3P connector (female terminals) No. 2:
   Test point 2	PCM connector A (51P) No. 47 - Refer to: PCM Connector for Inputs and Outputs (2017 2018 2019 2020),

   Courtesy of HONDA, U.S.A., INC.

   Is there continuity?

   YES 

   The PD SNSR wire is OK. Check for any authorized service information related to the DTCs or symptoms you are troubleshooting, or substitute a known-good PCM - Refer to: PCM Removal and Installation (2016 2017 2018 2019 2020) , then recheck. If DTC P0533 goes away and the PCM was substituted, replace the original PCM - Refer to: PCM Removal and Installation(2016 2017 2018 2019 2020) .

   NO 

   Repair an open in the PD SNSR wire between the PCM (A47) and the A/C pressure sensor.

5. Open wire check (GND line)

   -1. Turn the vehicle to the OFF (LOCK) mode.

   - 2. Jump the SCS line with the HDS, and wait more than 1 minute.

   - 3. Disconnect the following connector.

   PCM connector A (51P)

   - 4. Check for continuity between test points 1 and 2.

   Test condition	Vehicle OFF (LOCK) mode
   	A/C pressure sensor 3P connector: disconnected
   	PCM connector A (51P): disconnected
   Test point 1	A/C pressure sensor 3P connector (female terminals) No. 1:
   Test point 2	PCM connector A (51P) No. 20 - Refer to: PCM Connector for Inputs and Outputs (2017 2018 2019 2020), or PCM Connector for Inputs and Outputs (2016)

   Courtesy of HONDA, U.S.A., INC.

   Is there continuity?

   YES 

   The GND wire is OK. Check for any authorized service information related to the DTCs or symptoms you are troubleshooting, or substitute a known-good PCM - Refer to: PCM Removal and Installation (2016 2017 2018 2019 2020) or PCM Removal and Installation (2016) .

   NO 

   Repair an open in the GND wire between the PCM (A20) and the A/C pressure sensor.